package com.codejiwei.flink.practice;

import org.apache.flink.api.common.typeinfo.Types;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.util.Collector;

import java.util.Arrays;

/**
 * @author jiwei
 * @description
 * @date 2023/5/23 14:44
 */
public class Flink_Windows_Count {
    public static void main(String[] args) throws Exception {

        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setParallelism(10);

        env.socketTextStream("localhost", 8889)
                .flatMap((String line, Collector< Tuple2<String, Long> > out) -> {
                    Arrays.stream(line.split("\\W+")).forEach(word -> out.collect(Tuple2.of(word, 1L)));
                }).returns(Types.TUPLE(Types.STRING, Types.LONG))
                .keyBy(t -> t.f0)
//                .countWindow(3)
                .countWindow(3, 2)
                .sum(1)
                .print();

        env.execute();
    }
}
